Drill-press.



N. A. JENNET.

DRILL PRESS.

AYPLIOATIOH FILED JAH. 25. 191.1.

Fig-4 Patented Aug. 15, 1911.

application.

'i yNlllWlllL A. JNNET, OF COALINGA, CALIFORNIA.

nmnnnnss.

Application tiled January 25, 11911. Serial No. 604,570.

4To 'ell whom 'it-may concern.'

Be it known that I, NEWEL A. Jenner, a

.citizen'of the UnitedStates, residing'at Coal'inga, in the county of Fresno, State of California, have invented certain new and useful Improvements in l)rill-Presses; and l do declare the following-to be a full, clear, and exact: description of the same, such as 'will enable. others skilled in the art to which it appertains to make and use the same, reference beingr had` to the accompanying drawings, and to the characters of reference marked thereon, which form 'a part of this 'llhis'invention relates to improvements irldrills and drill presses of all kinds, the object of thehinvcntion being to drill press which willbore or dril a square hole. l

A further object ofthe invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which itis designed.

These objects, I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings, similar characters of reference indicate corresponding parts in the several views.

Figure 1 1s a 51de elevation of my comn plete improved drill press. Fig. 2 is a side,

view partly in section of the drill chuck. Fig. 3 is a sectional view of the lower portions of the rdrill chuck. Fig. 4 is aseotional Aview taken on line y-y of Fig. 3. Fig. 5 is a sectional view showing an eccentric mechanism. Fig. 6 is a side Vview of the drill. Referring now more particularly to the characters of reference on the drawings, 1

designates the main frame of the drill press having three' 'inwardly projecting; arms 2, 3 and` 4 respectively,A and the usual work support or platform 5.

6 designates the usual driving shaft connected byv gears 7 and 48 to the driven shaft 9 carrying a pinion wheel 10'and a pinion wheel 11 spaced apart.- Journaled in the outer end of the arms 3 and 4 is a sleeve 1 2 carryinga rack 13 there being a slotted box 14secured on the lower end of said sleeve 12 by means of a setiscrew .14". A

15 is `adrill shaft whichA is journaled in the arm 22a-nd also in each end of the sleeve reduce a Specification of Letters Patent.

12 and projects, downwardly through suchy sleeve 12 1n a central manner and having a ytion of the sleeve 12 and the structure de- 90 through the slotted block 14 thus causing the 95 'ber 1ra-2o which will drive the drin to afio" Patented Aug.

bent eccentric arm 16 on its lower end-` 0111i.l

which is vertically movable'a 'square 'block'O 17 normally resting Iand held inaslot '1813 of:l

in` the following manner, viz: Each'ofpsaitlll! blocks i'scut in an oblique line orangle asfalt 6b.

cz the member 20 having a groove 21 line-' side of the line a and the member 19 havEv ing a tongue 22 slid'ab'le into said groove. y Said member 2() has shoulders 23fandf24ff' projectingl in' the sai-d groove through wliichj70 shoulders and tl'irough which mem fer 22 i'sf a threaded pin'` 25 having a square 1198x1525@ Said Pin 25 being suitablyjournaled inlthb said shoulders 23 and 24." In the b ot'tdmriO-rg the member 20 is a-drill recess 27'recevingl'f7 the drill 27a.- The member-'19;20jfisyslidl'z" member .14 movable in' slots 29 in 'the menifi ber .20.v l.

On the sleevev 12 is apinion 30 intermesh ingr with the pinion wheel 10 said pinion 30 i being keyedto slide vertically on said sleeve 12.' Similarly 'on the shaft 15 is 'a pinionl` adaptedto engage the pinion 11 said pin- 85 ion 31 being keyed to slide vertically on the shaft 15. The 4pinion mechanism is so"y roportioned that the shaft 15 will be drlven' five times or five revolutions to one revolu` scribed will drive the sleeve 12 around in a circular motion whereby the eccentric 16 and lits block .17 moving in the slot 18 will drive' the memb'erV 19-20 back and forth` drill 27* to drill a hole square since the round tendency given by the motion of the sleeve 12 will be counteracted by the square back and' forth motion of the 'memcorner and back four times to each complete revolution.

' If'it is desired to drill a round hole, the pinion 11 may be lifted clear ofits key 12 will clear it from ..gagementwith the pine stationarywith respect to the sleeve 12 by means of ja pin 32 projecting through the,

bers 15 and 12 will move in a direct ci-i'- cular motion permitting the drill 27.Il to drill and turnedz to i st on top of said key which 105 box 14 and chuck 20 andthen the two mema round hole, the pins 32 being so posi' tioned as to bring the drill recess 27 in aA may be desired.

In order to change the stroke of the drill to bore a smaller or larger hole, the head 26 of the pin 25 may be operated to tuin` around whereby the member 1,9 will be moved up or down on the member 20 thus making the operation of. the moreinent'of4 the member 19-20 in the 'member 14, greater or less as is desired; which, of course, increases or decreases the. size of the hole. Vith this upward 'or downward movement of the member 19, the member 17 is moved up or down on the member 16 permitting said adjustment.

The drill. 27is specially constructed to perform the operation of drilling a square hole. It has three square sides and is out oil` at the bottom` in a beveled manner givinglr a. cutting edge to but two sides as shown in Fig. 7 To drill a round hole this drill 27* would besupplanted by .an ordinary twisted drill. A

From the oregoingdescriptiom it Will readily be seen th'at I have roduced a drill which will drill a square ho e; hence, I have substantially fulfilled the objects of the invention as set forth herein.'

llVhile'this specification sets forth in detail the present and preferred construction of the device, still in practice such deviathe invention. I I-lavmg thus described my invention what I `claim as new and useful and desire to seei'ie by Letters Patent. is:

ILA drill press comprising a` rotating u u n n sleeve, a rotating shaft within said sleeve,l

a slotted box on said sleeve a drill chuck movable in said box, and an eccentric'fconneetion between said drill chuck and said rotating shaft.

Q.A drill press comprising a rotating sleeve, a. rtating shaft within said sleeve, a slotted box in the end of said sleeve, a drill chuck movable in said'slotted box and hav ing' a slot in its upper end anda block movable in said slot, said block being connected in au eccentric manner with said rotating shaft as described.

3. A drill press comprising a.. rotating sleevel a. rotating shaft Within said sleeve, a slotted box on said sleeve, a drill chuck movable in said slotted box, such drill chuck comprising tivo members impinging one upon the other in an oblique manner, means for moving said blocks 1n opposite directions with respect to each other and an ecf centric means connecting said chuck with said rotating shaft as described. In testimony whereof. I aiiix my signature in presence of two witnesses.

NEWEL A. JENNET.4

lVitnesses:

J. B. WEBSTER, FRANK H. CARTER. 

